Re: [Xen-devel] [PATCH v1 4/4] libxl: info: Display build_id of the hypervisor.

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Thu, 2015-10-08 at 22:56 -0400, Konrad Rzeszutek Wilk wrote:
> If the hypervisor is built with we will display it.
> 
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> ---
>  tools/libxl/libxl.c         | 16 ++++++++++++++++
>  tools/libxl/libxl_types.idl |  1 +
>  tools/libxl/xl_cmdimpl.c    |  1 +
>  3 files changed, 18 insertions(+)
> 
> diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
> index efa6462..f9af78c 100644
> --- a/tools/libxl/libxl.c
> +++ b/tools/libxl/libxl.c
> @@ -5249,6 +5249,7 @@ libxl_numainfo *libxl_get_numainfo(libxl_ctx *ctx,
> int *nr)
>      return ret;
>  }
>  
> +#define BUILD_ID_LEN 1024 /* Same size as xen_commandline. */

This either needs to be well defined in the hypercall ABI or the code here
needs to cope with expanding the buffer on ENOBUFS and trying again.

Ian.

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